<template>
  <div class="app-container">
    
    <!-- 顶部 Header 区域 -->
    <mt-header fixed title="城商●Vue项目">
          <a  slot="left" v-if="flag">
            <mt-button icon="back" @click="goback">返回</mt-button>
          </a>
    </mt-header>

    <!-- 中间的 路由 router-view 区域 -->
	<transition>
		<router-view></router-view>
	</transition>
	
    <!-- 底部 Tabbar 区域 -->
    <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-llb" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-llb" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-llb" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{ $store.getters.getAllCount }}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-llb" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>

  </div>
</template>

<script>
export default {
  data(){
    return {flag: false}
    // return {}
  },
  created(){
    // 页面刚加载时 flag 默认为false, 如果页面刷新 flag 变成默认值，不是/home，我们需要将flag变成true
    this.flag = (this.$route.path === "/home") ? false : true;
  },
  watch: {
    '$route' (to, from) {
      // 对路由变化作出响应...
      if( to.path === '/home'){
        this.flag = false
      }else{
        this.flag = true
      }
    }
  },
  methods:{
    goback(){
      // 点击后退
      this.$router.go(-1);
    }
  }
}


</script>


<style lang="scss" scoped>
.mint-header{
  z-index: 99;
}

.app-container {
  padding-top: 40px;
  padding-bottom: 50px;
  overflow-x: hidden;  // 去掉切换时的滚动条
}

// transition 动画区域，样式设置
// .v-enter,
// .v-leave-to{  // 这样设置会使页面在右侧进入、进出，我们将这两样式分开写
// 	opacity: 0;
// 	transform: translateX(100%);
// }

.v-enter{
	opacity: 0;
	transform: translateX(100%);//从右侧进来

}
.v-leave-to{  
	opacity: 0;
	transform: translateX(-100%);// 从左侧出来
	position: absolute;  //解决内容上下飘的问题
	
}

.v-enter-active,
.v-leave-active{
	transition: all 0.5s ease;
}

// 该类名，解决 tabbar 点击无法切换的问题
.mui-bar-tab .mui-tab-item-llb.mui-active {
    color: #007aff;
}

.mui-bar-tab .mui-tab-item-llb {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}

.mui-bar-tab .mui-tab-item-llb .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}

.mui-bar-tab .mui-tab-item-llb .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}

</style>


